It was not the first time that the show’s managers had tried to intercede, but they had limited options: Mr. Sheen’s contract does not include any kind of morals provision that would have allowed him to be fired or replaced. According to one longtime Hollywood agent (who, like many people quoted in this article, spoke on the condition of anonymity so as not to create any conflicts in their business), the show’s success had provided him with the leverage he needed to keep any such clause out.